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// RUN — FITS
Can the Apple M1 Ultra 64GB run DARTS (second order) (PTB)?
Yes — here's how fast and up to what context, with real measured numbers.
DARTS (second order) (PTB) on the Apple M1 Ultra 64GB
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 855k | 11826.1-14260.9 t/s | ~147.8-178.3 (slow) |
| Q8 | yes | 856k | 23652.2-28521.7 t/s | ~295.7-356.5 (slow) |
| Q4 | yes | 856k | 42236-50931.7 t/s | ~528-636.6 (slow) |
Estimate (memory-bound). Beyond "max context" the KV cache spills to SSD swap and speed drops to the "beyond" figure.
FAQ
Can the Apple M1 Ultra 64GB run DARTS (second order) (PTB)?▶
Yes. At Q4 it generates ~42236-50931.7 tok/s and fits up to 856k context; beyond that it spills to SSD swap and slows to ~528-636.6 tok/s.
How much context fits?▶
At Q4, up to about 856k tokens stay in fast memory; longer context spills to SSD swap and throughput collapses.